RT Journal Article SR Electronic T1 Textbook of Family Practice, Fifth Edition JF The Journal of the American Board of Family Practice JO J Am Board Fam Med FD American Board of Family Medicine SP 233 OP 233 DO 10.3122/jabfm.9.3.233 VO 9 IS 3 A1 Zervanos, Nikitas J. YR 1996 UL http://www.jabfm.org/content/9/3/233.1.abstract AB